What does code P0157 mean?
Very low voltage detected from the rear oxygen sensor indicating weak signal or lean condition
OBD-II Code
P0157 — Oxygen Sensor Circuit Low Voltage Bank 2 Sensor 2
Very low voltage detected from the rear oxygen sensor indicating weak signal or lean condition
Common symptoms
- Irregular fuel consumption
- check engine light
Possible causes
- Exhaust leak
- weak oxygen sensor
Initial recommendation
Repair exhaust leaks and inspect wiring.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0157 with your vehicle's actual symptoms for more complete diagnostic guidance.
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